Projector base



Feb. 19, 1935. P. w. CORNELIUS PROJECTOR BASE Filed Aug. 25, 1955 ll 7-.I I3 Inventor,

Pembroke W Ubrnzlius,

Attorneys Patented Feb. 19, 1935 UNITED STATES PATENT OFFICE Thisinvention relates to means for varying the angular adjustment of a baseherein shown as that of a. motion picture projecting machine. primaryobject of the invention is to provide simple means for adjusting theangularity of a base whereby the base may be tilted laterally as well aslongitudinally to compensate for uneven supporting surfaces as well asto direct a beam of light, in the case of the projecting machine, eitherupwardly or downwardly or laterally. Other primary objects'of theinvention are to provide a very simple structure which may be operatedreadily; that may be embodied in a very small and compact space so thatthe structure may be applied to a portable device without undue weight;and that may comprise but few parts permitting a low cost of production.

These and other objects and advantages of the invention will becomeapparent to those versed in the art in the following description of oneparticular form of the invention as illustrated by the accompanyingdrawing, in which Fig. 1 is a side elevation of a motion pictureprojecting machine to which myinvention is applied to have the forwardside of the base elevated;

Fig. 2, a detail in side elevation on anenlarged scale showing the rearend of the base elevated;

Fig. 3, a front elevation of the adjusting structure;

Fig. 4, a rear elevation, and

Fig. 5, a similar rear elevation with the structure adjusted to rest ona laterally inclined surface.

Like characters of reference indicate like parts throughout the severalviews in the drawing;

As one particular use of the invention, a motion picture projectingmachine generally designated by the numeral 10 is herein shown to have abase member 11. The front and rear ends of this member 11 carryrespectively a pair of spaced apart studs 12, 13 and 14, 15. I

I provide a bar 16 with a pair of spaced apart slots 17 and 18 cutdownfrom the upper edge and spaced apart to permit either pair of studs tobe entered therein. The bar 16 is provided with a downturned leg 19 and20 respectively at each end thereof. I further provide another bar 21,also having a pair of spaced apart slots 22 and 23 cut down from itsupper edge to receive either pair of studs therein. Each end of the bar21 is enlarged and screwthreadedly carries therethrough studs 24 and 25respectively, the lower ends of which are provided with the feet 26 and2'7. These studs pass vertically through the ends of the bar and looknuts 28 and 29 are provided respectively on the studs to retain them indesired positions.

Where the front end of the device to be adjusted is desired to be raisedor lowered, the bar 16 is preferably placed at the rear of the member 11to have the studs 14 and 15 extend through the slots 17 and 18 and wingnuts 30 and 31 are screwthreadedly engaged over the outer end of thesestuds and drawn up snugly to retain the bar 16 firmly against the end ofthe member 11. The other bar 21 is secured to the forward end of themember 11 by thumb or wing nuts 32 and 33 engaging the studs 22 and 23which extend through the slots in that bar. Then the studs 24 and 25 maybe turned to raise or lower the bar 21 as may be desired, followingwhich the lock nuts 28 and 29, here shown as having a knurled peripheryto permit operation by hand, are run down against the bar 21.

Should the supporting surface be uneven laterally or the device 10 berequired to be rocked laterally, then the thumb nuts may be loosened onthe respective studs to permit the member 11 to be angularly carriedbetween the bars 16 and 21 as suggested in Fig. 5. That is, by allowingfor example, the stud 14 to rest at the bottom of the 'slot 17 the otherstud 15 may be carried in an upper portion of its slot 18 and the twonuts 30 and 31 drawn up tightly against the bar to retain the member 11in that relation with the bar 16.

Where it is desirable to do the adjusting from the rear end of themember 11, such for example, as when the beam of light from theprojecting machine 10 is to be directed downwardly rather than upwardly,then the bars 16 and 21 may be interchanged to have the bar 21 at therear and the bar 16 at the front as indicated in Fig. 2. Bymeans of thestructure above described, I secure avery convenient and adjustingmechanism all without the use of tripods or the like and at the sametime secure a very rigid support permitting a uniform weight to besecured on each of the four legs of the device.

While I have herein shown and described the invention in the one form asnow best known to me, it is obvious that structural variations may bemade without departing from the spirit ofthe invention and I thereforedo not desire to be limited to that precise form beyond the limitationsas maybe imposed by the following claim.

I claim:

In a projection machine, the combination with a base having front andrear ends, a pair of spaced apart studs extending forwardly andrearwardly respectively from each of the ends, front and rear and anadjustable foot carried in each end of at I least one of said bars,whereby eitherone or both of the bars may be vertically raised orlowered along the studs with the bar ends rocked or at the sameelevation.

PELDBROKE W. CORNELIUS.

